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9.0 Critical

CVE-2026-18937 The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it accepts from user input…

Description

The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it accepts from user input on sites using plain permalinks, allowing unauthenticated users to overwrite arbitrary PHP global variables, and to execute arbitrary code on the server when a classic (non-block) is active.

Affected products and versions

Product Affected versions Fixed in
Broken Link Checker 2.4 earliest → < 2.4.12 2.4.12

Other CVEs of Broken Link Checker

The 3 CVEs of Broken Link Checker →
CVE-2024-10903 The Broken Link Checker WordPress plugin before 2.4.2 does not validate a the link URLs before making a request to them,… 4.7 Medium CVE-2022-3922 The Broken Link Checker WordPress plugin before 1.11.20 does not sanitise and escape some of its settings, which could… 4.8 Medium
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